Nissan Motor Corp. USA is offering Olympic viewers an oblique campaign from TBWA Chiat/Day, Venice, Calif., featuring dreamy music, shots of open skies and a dog flying across the screen. In one spot playing to Nissan's past, a man with a "Z" car holds a sign saying, "Drive happy." It's all a tease for an estimated $200 million branding effort breaking with a 2-minute epic spot Aug. 4 in the Olympics' closing ceremonies. Nissan will publicize the brand campaign and an effort to restage the franchise at a New York press event Aug. 1.